What is a disorder that causes inflammation of the bladder, also known as cystitis?

The correct answer is urinary tract infection, as this condition specifically leads to inflammation of the bladder, which is referred to as cystitis. Cystitis commonly occurs when bacteria enter the urinary tract, causing irritation and inflammation, which can result in symptoms such as frequent urination, discomfort, and burning sensations during urination.

The other options do not relate to the inflammation of the bladder. Vision change and visual impairment pertain to alterations in eyesight and have no connection to urinary health. Vitamins are essential nutrients that the body needs but are unrelated to infections or conditions affecting the bladder. Thus, the only relevant choice in this context is the urinary tract infection, as it directly causes cystitis.